Linux Kernel Ethernet mtk_ppe.c __mtk_ppe_check_skb use after free

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Summary

CVECVE-2022-3636
StatePUBLISHED
AssignerVulDB
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-10-21 11:15:09 UTC
Updated2026-07-28 18:17:19 UTC
DescriptionA vulnerability was identified in Linux Kernel 33fc42de33278b2b3ec6f3390512987bc29a62b7. This affects the function __mtk_ppe_check_skb of the file drivers/net/ethernet/mediatek/mtk_ppe.c of the component Ethernet Handler. Such manipulation leads to use after free. The name of the patch is 17a5f6a78dc7b8db385de346092d7d9f9dc24df6. It is best practice to apply a patch to resolve this issue. No released Linux Kernel version was ever affected by this CVE.

Risk And Classification

Primary CVSS: v4.0 5.1 MEDIUM from [email protected]

CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS: 0.003290000 probability, percentile 0.253930000 (date 2026-07-29)

Problem Types: CWE-119 | CWE-416 | CWE-416 Use After Free | CWE-119 Memory Corruption

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5.1MEDIUMCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/C...
4.0CNADECLARED5.1MEDIUMCVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1[email protected]Secondary5.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
3.1CNADECLARED5.5MEDIUMCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
3.0CNADECLARED5.5MEDIUMCVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
2.0[email protected]Secondary4.9AV:A/AC:M/Au:S/C:P/I:P/A:P
2.0CNADECLARED4.9AV:A/AC:M/Au:S/C:P/I:P/A:P/E:ND/RL:OF/RC:C

CVSS v4.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.0 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 11.0 All All All
Operating System Linux Linux Kernel - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Kernel affected 33fc42de33278b2b3ec6f3390512987bc29a62b7 Not specified

References

ReferenceSourceLinkTags
vuldb.com/vuln/211935 [email protected] vuldb.com
CVE-2022-3636 | Linux Kernel Ethernet mtk_ppe.c __mtk_ppe_check_skb use after free af854a3a-2127-422b-91ae-364da2661108 vuldb.com Permissions Required, Third Party Advisory
vuldb.com/cve/CVE-2022-3636 [email protected] vuldb.com
www.kernel.org [email protected] www.kernel.org
kernel/git/pabeni/net-next.git - pabeni net-next tree af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Mailing List, Patch, Vendor Advisory
vuldb.com/vuln/211935/cti [email protected] vuldb.com
Debian -- Security Information -- DSA-5333-1 tiff af854a3a-2127-422b-91ae-364da2661108 www.debian.org Third Party Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

SourceTimeEvent
CNA2022-10-21T00:00:00.000ZAdvisory disclosed
CNA2022-10-21T00:00:00.000ZCVE reserved
CNA2022-10-21T02:00:00.000ZVulDB entry created
CNA2026-07-28T18:56:36.000ZVulDB entry last update

Legacy QID Mappings

  • 181520 Debian Security Update for tiff (DSA 5333-1)

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